Man charged over Sydney sex attacks

A man has been charged over two violent sex assaults in Sydney, including one in which he allegedly kidnapped a 13-year-old girl at knifepoint.

Police say the first attack happened early last Sunday morning, when a 22-year-old woman was sexually assaulted and robbed in an inner-city motel room by a man armed with a gun.

On Friday morning, the 13-year-old was kidnapped in Parramatta and sexually assaulted at various places around southwest Sydney.

Police say when they tried to stop the man in his car in Bondi on Saturday morning he refused to stop, leading police on a pursuit through the area until he crashed into a parked car.

The 26-year-old has been charged with a string of offences, including 12 counts of aggravated sexual assault against a person under 16 years of age, robbery whilst armed and kidnapping.